【摘要】：針對20Cr Mo H齒輪材料應(yīng)用在電動汽車和工程機(jī)械變速箱產(chǎn)品中的齒輪設(shè)計與制造問題,研究了鍛造、熱處理工藝對20Cr Mo H齒輪鋼材料組織和力學(xué)性能的影響。通過鍛造、預(yù)備熱處理和滲碳淬火全過程的系統(tǒng)聯(lián)動控制等工藝方法,對20Cr Mo H鋼進(jìn)行試驗分析與研究。結(jié)果表明:將鍛造比控制在4以內(nèi),且鐓粗比≥1.5,拔長比≤2.5,可消除帶狀組織,有效改善材料組織和力學(xué)性能;選擇正火溫度區(qū)間為890~930℃,滲碳后直接淬火和二次淬火擴(kuò)散碳勢為0.70%~0.85%,強(qiáng)擴(kuò)比為1∶1,可以得到良好的金相組織和力學(xué)性能,保證合理的硬度梯度分布,以滿足20Cr Mo H鋼的齒輪零件質(zhì)量要求。
[Abstract]:In order to solve the problem of gear design and manufacture of 20Cr Mo H gear material used in electric vehicle and construction machinery gearbox, the effects of forging and heat treatment on the microstructure and mechanical properties of 20Cr Mo H gear steel were studied. The experimental analysis and research of 20Cr Mo H steel were carried out by means of forging, preparatory heat treatment and systematic linkage control of Carburizing and quenching process. The results show that the banded structure can be eliminated and the microstructure and mechanical properties of the material can be effectively improved by controlling the forging ratio within 4, upsetting ratio 鈮，

本文編號：2476155